Dr. Torahiko Koenji is an eccentric genius who dug out the ancient writings from the oldest layer of the earth. He translated the writings and learned the existence of 13 "Star Pieces" that had been hidden across the planet. If one should obtain all the Star Pieces, any wish could be granted. To that end, Dr. Koenji built search robots, known as "B-robots", to find the Star Pieces. However a trio of such robots, led by Cobrander, were activated without their sleep-education program being completed and thus started to commit bad deeds across the town. Fortunately, a team, composed of three "good" B-robots, had completed the whole course of sleep-learning, and befriended Yuzuru Koenji, Dr. Koenji's grandson. With Yuzuru, and his friends Sayuri Mitaka and Kuranosuke Kichijouji, the three good B-robots and the gang begin their search of the "Star Pieces" while overcoming the misdeeds of the three "bad" B-robots.

高圆寺博士制作的机器人卡布达。虽然性能比其他机器人差，但毅力不输给任何人。卡布达一直在寻找能实现任何愿望的石头，但总是有3人组的坏机器人来妨碍。和他们在足球、柔道、障碍物赛跑中对决，赢了的人能得到和平星，虽然有13个之多，但是全部收集起来的话似乎会发生非常棒的事情。